Do not lose secondary gpus and make sure to have an active gpu on multiple gpu configurations

gpu/config/gpu_util.h

Index: gpu/config/gpu_util.h
diff --git a/gpu/config/gpu_util.h b/gpu/config/gpu_util.h
index 6b89303d3bbe58acafc8c463be39508d4d4227e5..e0c82415ed461c2a56842a66c653c4134c96b959 100644
--- a/gpu/config/gpu_util.h
+++ b/gpu/config/gpu_util.h
@@ -34,6 +34,13 @@ GPU_EXPORT void ApplyGpuDriverBugWorkarounds(
 GPU_EXPORT void StringToFeatureSet(
     const std::string& str, std::set<int>* feature_set);
 
+// With provided command line, fill gpu_info->secondary_gpus with parsed
+// secondary vendor and device ids.
+GPU_EXPORT void ParseSecondaryGpuDevicesFromCommandLine(
+    const base::CommandLine& command_line,
+    bool use_testing_switches,
+    GPUInfo* gpu_info);
+
 }  // namespace gpu
 
 #endif  // GPU_CONFIG_GPU_UTIL_H_